Background
LRMH is dedicated to the research of materials and their alterations. Organized in nine thematic departments, one is devoted to stained glass and assists architects and curators by providing scientific and technical support during restorations. So when Notre-Dame de Paris burned down in 2019, LRMH was immediately involved and, with its partners, set up a methodology for sorting, classifying, and inventorizing the rubble in order to study and, where possible, reuse it during the restoration phase. The Laboratory also advised the project’s management and the public institution on diagnosis of the vaults and the cleaning methods of the cathedral.